Javascript access:

// To SET values ([o] is the target object)
[o].style.borderBottomWidth="border-bottom-width value"// To GET values you must first get the computed style object// To get that object in IE or Opera:
var cStyle=[o].currentStyle;
// To get that object in Firefox, Chrome or Safari (w3c-type):
var cStyle=window.getComputedStyle([o],null)
// To GET the property value:
var value=cStyle.borderBottomWidth;
/* Don't expect to get the initial value
for a NOT pre-set border width.*//* IE and Opera will return a value in units as used with a Set.
Firefox will return a calculated float value in pixel(px).
Chrome or Safari will return a calculated int value in pixel(px)*/